Use of the National Ignition Facility with green light as the laser output is an intriguing option for advanced applications ranging from inertial fusion to production of compact x-ray sources. Particular attention is given to the potential use of 0.53 micrometers light to produce a high-energy x-ray source. This application requires the efficient generation of high-energy electrons which can subsequently produce high-energy x-rays as they transport into gold or other high Z wall. One- and two-dimensional computer simulations are used to explore high-energy electron generation by intense 0.53 micrometers laser light in a plasma with density near one-quarter the critical density. Significant absorption is shown to occur into high-energy electrons with an effective temperature which is reduced by the development of ion fluctuations. The results compare favorably with some recent experiments using 0.53 micrometers light.